You may want to read the FAO ...
Published by Benjamin Brière de l'Isle ., Employee at WRc Plc
You may want to read the FAO Paper 56 on Irrigation and drainage http://www.fao.org/docrep/x0490e/x0490e00.htm
Published by Benjamin Brière de l'Isle ., Employee at WRc Plc
You may want to read the FAO Paper 56 on Irrigation and drainage http://www.fao.org/docrep/x0490e/x0490e00.htm